CN110052599A - A kind of 108 or more low density rigid alloying pellet of diameter and preparation method thereof - Google Patents
A kind of 108 or more low density rigid alloying pellet of diameter and preparation method thereof Download PDFInfo
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- CN110052599A CN110052599A CN201910345090.0A CN201910345090A CN110052599A CN 110052599 A CN110052599 A CN 110052599A CN 201910345090 A CN201910345090 A CN 201910345090A CN 110052599 A CN110052599 A CN 110052599A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention discloses a kind of low density rigid alloying pellet, alloy powder includes tungsten carbide, titanium carbide, nickel, chromium carbide and molybdenum, the mass percent of each alloy sub-material are as follows: tungsten carbide, 26%-28%；Titanium carbide, 43-45%；Nickel, 18-20%；Chromium carbide, 1.5-2%；Molybdenum, 7-9%.Density is small, solves previous big density rigid alloying pellet, since substance is larger, it is big using impact force, the problem of causing valve seat to be broken and reduce the service life, using isostatic cool pressing and blank machine-shaping mode, even density, efficiently solve compacting defect, within product ovality 0.2mm, surface smoothness≤3.2, special paraffin, rubber molding agent, it prepares according to a certain percentage, additional amount is 2-2.5%, it can guarantee that sintered carbide ball has excellent processing performance, lower binder usage amount is easy removing during the sintering process simultaneously, effectively prevent sintering crack, carbon content fluctuation.
Description
Technical field
The present invention relates to alloy ball material and preparation method thereof correlative technology field more particularly to a kind of 108 or more diameters
Low density rigid alloying pellet and preparation method thereof.
Background technique
Hard alloy refers to hard compounds and binding metal refractory metal one made of powder metallurgical technique
Kind alloy material.Hard alloy valve ball can be used together with valve seat, need to meet the functional requirements such as wear resistant corrosion resistant.Currently, state
It is inside and outside that powder metallurgical technique is generally taken to produce sintered carbide ball.The hard alloy produced using this powder metallurgical technique
Ball, generally existing following problem: (1) ordinary rigid alloy valve ball trade mark density is in 9g/cm3 or more；(2) due to previous binder
Effect is bad, is unfavorable for thoroughly removing binder when processed green compact and sintering, causes the alloying pellet of 108 or more diameter to be sintered and split
Line, product have graphite-phase, porosity that A02, B02 is not achieved, and occur being greater than or equal to 25 microns of hole；(3) green density is not
Uniformly, all directions linear contractive quotiety is consistent when sintering, and dimensional accuracy is low, and for ovality in 1mm or more, subsequent fine grinding is very tired
It is difficult.Furthermore after the diameter of ball is more than 108mm, rejection rate is greatly increased.Do not occur density also both at home and abroad at present lower than 7.1-
7.3g/cm3, diameter 108 or more sintered carbide ball produce in batches technique.
Summary of the invention
The present invention provides a kind of 108 or more low density rigid alloying pellet of diameter and preparation method thereof, above-mentioned existing to solve
The deficiency of technology, density is small, solves previous big density rigid alloying pellet.It is big using impact force since substance is larger, cause valve
The problem of seat is broken and reduces the service life, the density of alloying pellet prepared by the present invention are the hard alloy of 7.1-7.3 g/cm3,
The sintered carbide ball that can be used for 108 or more diameter, has widened sintered carbide ball use scope；In conjunction with low density rigid alloy designations
Formula components, special paraffin, rubber molding agent are prepared, additional amount 2-2.5%, it is ensured that hard according to a certain percentage
Alloying pellet has excellent processing performance, while lower binder usage amount is easy removing during the sintering process, effectively avoids
Sintering crack, carbon content fluctuation；Using isostatic cool pressing and blank machine-shaping mode, even density efficiently solves compacting
Defect is prepared within resulting alloying pellet ovality 0.2mm, surface smoothness≤3.2；Using special material and geometry
Cutter carries out the ball green compact of Intelligent Machining to column green compact, and size progress can be controlled in ± 0.2mm, and ovality reaches 0.1；Using
Special sintering process, thoroughly removes forming agent, is sintered out alloying pellet flawless, product dense uniform, porosity reach A02,
B02, the hole more than or equal to 25 microns, non-compound carbon C00.
In order to achieve the object of the present invention, the following technology of proposed adoption:
A kind of 108 or more low density rigid alloying pellet of diameter, alloy powder includes tungsten carbide powder, carbonized titanium powder, nickel powder, chromium carbide
Powder and molybdenum powder, the mass percent of each alloy powder are as follows: tungsten carbide, 26%-28%；Titanium carbide, 43-45%；Nickel, 18-20%；Carbon
Change chromium, 1.5-2%；Molybdenum, 7-9%.
Specifically, 108 or more low density rigid alloying pellet of diameter the preparation method is as follows:
(1) configure alloying pellet used in alloy powder, alloy powder include tungsten carbide powder, carbonized titanium powder, nickel powder, carbonization chromium powder with
And molybdenum powder, the mass percent of each alloy powder are as follows: tungsten carbide, 26%-28%；Titanium carbide, 43-45%；Nickel, 18-20%；Carbonization
Chromium, 1.5-2%；Molybdenum, 7-9%.
(2) according to wet-milling 68-74h is carried out after the mass percent ingredient as described in step (1), quality is added during wet-milling
Score is the paraffin rubber solutions binder of 2.0-2.5%, drying and homogenization, reaches each raw material and binder is evenly distributed
Mixture；
(3) mixture is poured into punching block, is placed on hydraulic press, moulding pressure 100MPa takes off after suppressing pressure maintaining 3-5min
Mould；
(4) soft mode is put into step (3) resulting green compact, carries out compression process, is compressed to cylinder plate-like compaction；
Pressure is 200-220MPa, pressing time 3-5min when step (4) is suppressed；
(5) Intelligent Machining is carried out to the resulting cylinder plate-like compaction of step (4), is processed into spherical green compact；
(6) pressure sintering is carried out to spherical green compact described in step (5)；
Sintering temperature is 1460-1470 DEG C, soaking time 90min, moulding pressure 5-6MPa in step (6).
Specifically, the binder that step (2) uses is the mixture of paraffin and rubber.
Specifically, the mass fraction of binder paraffin and rubber are as follows: paraffin, 70%；Rubber, 30%.
Specifically, step (4), using cold isostatic press compression process.
Specifically, step (6) carries out pressure sintering using low pressure and demoulding integral sintering technique.
The advantages of above-mentioned technical proposal, is:
1, density is small, solves previous big density rigid alloying pellet, big using impact force since substance is larger, causes valve seat disconnected
The problem of splitting and reducing the service life, the present invention are prepared for a kind of sintered carbide ball that density is 7.1-7.3g/cm3, can be used for
The sintered carbide ball of 108 or more diameter, has widened sintered carbide ball use scope；
2, in conjunction with the formula components of low density rigid alloy designations, special paraffin, rubber molding agent are matched according to a certain percentage
System, additional amount 2-2.5%, it is ensured that sintered carbide ball has excellent processing performance, while lower binder usage amount
It is easy removing during the sintering process, effectively prevents sintering crack, carbon content fluctuation；
3, using isostatic cool pressing and blank machine-shaping mode, even density efficiently solves compacting defect, product ovality
Within 0.2mm, surface smoothness≤3.2；
4, the ball green compact of Intelligent Machining is carried out to column green compact using special material and the cutter of geometry, size progress is controllable
For system in ± 0.2mm, ovality reaches 0.1；Using special sintering process, forming agent is thoroughly removed, is sintered out alloying pellet without splitting
Line, product dense uniform, porosity reach A02, B02, and nothing is greater than and the hole equal to 25 microns, non-compound carbon C00.
Detailed description of the invention
Fig. 1 shows the preparation flow figure of low density rigid alloying pellet.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention do into
The detailed description of one step.
Low density rigid alloying pellet is prepared according to preparation flow as shown in Figure 1.
Embodiment 1
(1) alloy powder used in alloying pellet, the mass percent of each alloy powder are configured are as follows: tungsten carbide, 28%；Titanium carbide,
43%；Nickel, 20%；Chromium carbide, 1.5%；Molybdenum, 7.5%；
(2) according to ingredient as described in step (1) than carrying out 68~74h of wet-milling after ingredient, it is special that 2.0~2.5% are added therebetween
Binder (paraffin: rubber=7:3), drying and homogenization reach the mixture that each raw material and forming agent are evenly distributed;
(3) it after punching block pours into mixture, is placed on hydraulic press, moulding pressure 100MPa, is demoulded after suppressing pressure maintaining 3-5min；
(4) green compact of demoulding is put into soft mode, carries out cold isostatic press compression process, handle major parameter: pressure 200-
220MPa, pressing time are 3-5 minutes.After cold isostatic press compression process, green density high uniformity, it is ensured that ball pressure when sintering
Base all directions linear contractive quotiety is consistent；
(5) the cylinder plate-like compaction that isostatic cool pressing processing is completed is subjected to Intelligent Machining, is dimensioned to spherical green compact according to drawing,
Ensure the dimensional accuracy and ovality of spherical green compact；
(6) it examines use low pressure-dewaxing integral sintering technique of qualified ball green compact to carry out pressure sintering, is sintered major parameter:
Sintering temperature is 1460-1470 DEG C, soaking time 90min, moulding pressure 5-6MPa.
Embodiment 2
(1) alloy powder used in alloying pellet, the mass percent of each alloy powder are configured are as follows: tungsten carbide, 27%；Titanium carbide,
44%；Nickel, 19%；Chromium carbide, 1.8%；Molybdenum, 8.2%；
(2) according to ingredient as described in step (1) than carrying out 68~74h of wet-milling after ingredient, it is special that 2.0~2.5% are added therebetween
Binder (paraffin: rubber=7:3), drying and homogenization reach the mixture that each raw material and forming agent are evenly distributed;
(3) it after punching block pours into mixture, is placed on hydraulic press, moulding pressure 100MPa, is demoulded after suppressing pressure maintaining 3-5min；
(4) green compact of demoulding is put into soft mode, carries out cold isostatic press compression process, handle major parameter: pressure 200-
220MPa, pressing time are 3-5 minutes.After cold isostatic press compression process, green density high uniformity, it is ensured that ball pressure when sintering
Base all directions linear contractive quotiety is consistent；
(5) the cylinder plate-like compaction that isostatic cool pressing processing is completed is subjected to Intelligent Machining, is dimensioned to spherical green compact according to drawing,
Ensure the dimensional accuracy and ovality of spherical green compact；
(6) it examines use low pressure-dewaxing integral sintering technique of qualified ball green compact to carry out pressure sintering, is sintered major parameter:
Sintering temperature is 1460-1470 DEG C, soaking time 90min, moulding pressure 5-6MPa.
Embodiment 3
(1) alloy powder used in alloying pellet, the mass percent of each alloy powder are configured are as follows: tungsten carbide, 26%；Titanium carbide,
45%；Nickel, 18%；Chromium carbide, 2%；Molybdenum, 9%；
(2) according to ingredient as described in step (1) than carrying out 68~74h of wet-milling after ingredient, it is special that 2.0~2.5% are added therebetween
Binder (paraffin: rubber=7:3), drying and homogenization reach the mixture that each raw material and forming agent are evenly distributed;
(3) it after punching block pours into mixture, is placed on hydraulic press, moulding pressure 100MPa, is demoulded after suppressing pressure maintaining 3-5min；
(4) green compact of demoulding is put into soft mode, carries out cold isostatic press compression process, handle major parameter: pressure 200-
220MPa, pressing time are 3-5 minutes.After cold isostatic press compression process, green density high uniformity, it is ensured that ball pressure when sintering
Base all directions linear contractive quotiety is consistent；
(5) the cylinder plate-like compaction that isostatic cool pressing processing is completed is subjected to Intelligent Machining, is dimensioned to spherical green compact according to drawing,
Ensure the dimensional accuracy and ovality of spherical green compact；
(6) it examines use low pressure-dewaxing integral sintering technique of qualified ball green compact to carry out pressure sintering, is sintered major parameter:
Sintering temperature is 1460-1470 DEG C, soaking time 90min, moulding pressure 5-6MPa.
To density value, hardness number, fracture, the metallographic of the alloying pellet that embodiment 1 to 3 is prepared under different-alloy powder mixture ratio
Grain size and porosity are detected, and testing result is as shown in the table:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Density value g/cm3 | 7.28 | 7.21 | 7.14 |
| Hardness number HRA | 90~91.3 | 90.5~91.5 | 90.7~91.7 |
| Fracture | Fracture is normal | Fracture is normal | Fracture is normal |
| Metallographic grain size μm | WC grain: 0.8 ~ 1.2；Ni layers of < 1.0 | WC grain: 0.8 ~ 1.2；Ni layers of < 1.0 | WC grain: 0.8 ~ 1.2；Ni layers of < 1.0 |
| Porosity | A02B02C00 | A02B02C00 | A02B02C00 |
It is shown by the above detection data, from embodiment 1 to embodiment 3, is carbonized by changing alloy powder used in alloying pellet
The proportion of tungsten, titanium carbide, nickel, chromium carbide and molybdenum, to detect with tungsten carbide, titanium carbide, nickel, chromium carbide and molybdenum content
Change the influence to the density value of alloying pellet, hardness number, microstructure morphology, metallographic grain size and porosity, it can from table
To learn, under the proportion of different tungsten carbides, titanium carbide, nickel, chromium carbide and molybdenum, the density value of alloying pellet is in 7.28-
Between 7.14 g/cm3, well below the alloying pellet density (9g/cm3 or more) of prior art production, that is to say, that by above
Powder mixture ratio the alloying pellet of low-density can be made.
Other than density is the key property of alloying pellet, the hardness number of alloying pellet is also the key property of alloying pellet, because
Also need hardness higher while alloying pellet will meet low-density, and by being found to embodiment 1 to the detection for implementing 3, implement
Hardness number in example 1 is 90-91.3HRA, and implementing the hardness number in 2 is 90.5-91.3 HRA, and the hardness number in embodiment 3 is
90.7-91.7 HRA is closed with the reduction of tungsten carbide content, and with the increase of titanium carbide, nickel, chromium carbide and molybdenum content
The hardness of gold goal is in the state increased, and when embodiment 3, the hardness number of total gold goal has reached maximum value (90.7-91.7
HRA).
In order to observe fracture apperance after sintering in alloying pellet and by fracture analysis be to detect incision position alloying pellet
It is no normal, when there is defect and be mingled with.By the appearance analysis to embodiment 1 to embodiment 3, embodiment 1 is found
Normal to its fracture in 3, incision position is not occur the defects of layering, crackle, hole, dirtyization, carburizing and decarburization.
Reinforced phase plays an important role in alloying pellet for the excellent mechanical performance of alloying pellet, and for the invention,
The reinforced phase of alloy is tungsten carbide phase, and the grain size size of tungsten carbide reinforced phase can react the hardness level of alloying pellet, for
For the invention, nickel is the toughening material of entire alloy, and the grain size size of nickel correlation phase can be derived that the toughness of the alloying pellet
Size, as can be seen from the table, under different powder mixture ratios, the grain size of reinforced phase tungsten carbide and toughening phase is roughly equal.
Porosity, the size of the void for detecting alloying pellet, present invention employs the conjunctions of GB/T 3489-2015 hard
The metallographic of golden porosity and non-compound carbon measures method and has carried out voidage detection, detection knot to the alloying pellet under different embodiments
Fruit is unanimously A02B02C00, and wherein A02 indicates that the hole for being less than or equal to 10 μm present in alloying pellet is entirely closing
Volume accounting score is 0.02% in gold, that is to say, that the hole less than or equal to 10 μm is less in entire alloy；B02 is indicated
Volume accounting score of the hole in entire alloy existing in the alloy between 10 μm -25 μm is 0.02%, that is to say, that
Hole between 10 μm -25 μm is less in entire alloy；C00 indicates not detect non-compound carbon in the alloy, in alloy
Non-compound carbon is also referred to as free carbon or graphite inclusion, actually a kind of hole.And if there is non-compound carbons will affect in alloy
The mechanical performance of alloy, meanwhile, non-compound carbon is a whether proper test value of alloying pellet preparation process, if in the detection not
There are non-compound carbons, then it represents that the alloying pellet of required characteristic can be made in preparation process.
In conclusion the Comprehensive Comparison by embodiment 1 to embodiment 3 is found, matched in different alloy powders
Under, the density value of resulting alloying pellet is respectively less than 9g/cm3, although the density of different ratio is varied, variation fluctuation compared with
It is small, and the density value of respectively less than existing alloying pellet；Under different alloy powder proportions, the hardness number of resulting alloying pellet is
90-91HRA, resulting alloy meet conventional cemented carbide requirement (86-93HRA)；Under being matched to different alloy powders, gained
Alloy fracture it is normal；Porosity is normal, and non-compound carbon does not occur under different ratio, in resulting alloy
Reinforced phase is mutually present in alloying pellet with toughening, just illustrates that the hardness number of alloying pellet under different ratio is higher, and fracture
Normal reason is presented.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, it is clear that those skilled in the art
Various changes and modifications can be made to the invention by member without departing from the spirit and scope of the present invention.If in this way, of the invention
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these to these modifications and variations
Including modification and variation.
Claims (6)
1. a kind of 108 or more low density rigid alloying pellet of diameter, it is characterised in that: alloy powder includes tungsten carbide powder, titanium carbide
Powder, nickel powder, carbonization chromium powder and molybdenum powder, the mass percent of each alloy powder are as follows: tungsten carbide, 26%-28%；Titanium carbide, 43-
45%；Nickel, 18-20%；Chromium carbide, 1.5-2%；Molybdenum, 7-9%.
2. a kind of preparation method for preparing 108 or more low density rigid alloying pellet of diameter as described in claim 1, feature exist
In: the preparation method is as follows:
Configure alloy powder used in alloying pellet, the mass percent of each alloy powder are as follows: tungsten carbide, 26%-28%；Titanium carbide,
43-45%；Nickel, 18-20%；Chromium carbide, 1.5-2%；Molybdenum, 7-9%；
According to wet-milling 68-74h is carried out after the mass percent ingredient as described in step (1), mass fraction is added during wet-milling is
The binder of 2.0-2.5%, drying and homogenization reach the mixture that each raw material and binder are evenly distributed；
Mixture is poured into punching block, is placed on hydraulic press, moulding pressure 100MPa is demoulded after suppressing pressure maintaining 3-5min；
Soft mode is put into step (3) resulting green compact, compression process is carried out, is compressed to cylinder plate-like compaction；
Pressure is 200-220MPa, pressing time 3-5min when the step (4) is suppressed；
The resulting cylinder plate-like compaction of step (4) is processed, spherical green compact is processed into；
Pressure sintering is carried out to spherical green compact described in step (5)；
Sintering temperature is 1460-1470 DEG C, soaking time 90min, moulding pressure 5-6MPa in the step (6).
3. the preparation method of 108 or more low density rigid alloying pellet of diameter according to claim 2, it is characterised in that: step
Suddenly the binder that (2) use is the mixture of paraffin and rubber.
4. the preparation method of 108 or more low density rigid alloying pellet of diameter according to claim 3, it is characterised in that: institute
State the mass fraction of binder paraffin and rubber are as follows: paraffin, 70%；Rubber, 30%.
5. the preparation method of 108 or more low density rigid alloying pellet of diameter according to claim 2, it is characterised in that: institute
Step (4) are stated, using cold isostatic press compression process.
6. the preparation method of 108 or more low density rigid alloying pellet of diameter according to claim 2, it is characterised in that: institute
It states step (6) and pressure sintering is carried out using low pressure and demoulding integral sintering technique.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110814338A (en) * | 2019-12-02 | 2020-02-21 | 株洲硬质合金集团有限公司 | Preparation method of large hard alloy wear-resistant block with complex shape |
| CN111318692A (en) * | 2020-04-16 | 2020-06-23 | 上海钨睿新材料科技有限公司 | Cold isostatic pressing process for efficiently producing hard alloy bars |
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| JPS58111302A (en) * | 1981-12-25 | 1983-07-02 | Seiko Instr & Electronics Ltd | Manufacture of rare earth magnet |
| CN104561724A (en) * | 2014-03-26 | 2015-04-29 | 张震宇 | Steel bonded hard alloy with high hardness and high wear resistance |
| CN106191604A (en) * | 2016-08-11 | 2016-12-07 | 青岛文创科技有限公司 | A kind of wearable lightweight hard alloy |
| CN107779717A (en) * | 2017-09-20 | 2018-03-09 | 苏州瑞森硬质合金有限公司 | Light-high-strength titanium-based fine grain hard alloy bar material and its preparation technology |
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| CN110814338A (en) * | 2019-12-02 | 2020-02-21 | 株洲硬质合金集团有限公司 | Preparation method of large hard alloy wear-resistant block with complex shape |
| CN111318692A (en) * | 2020-04-16 | 2020-06-23 | 上海钨睿新材料科技有限公司 | Cold isostatic pressing process for efficiently producing hard alloy bars |
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